U.S.D.A. Official’s Emails With Lobbyists Are Sought After Hearing

The Times and ProPublica reported Monday that Ms. Adcock had refused in September to release the names of her deregulation teammates to congressional aides. On Tuesday morning, before she testified to two subcommittees of the House Committee on Oversight and Government Reform about deregulation, the Department of Agriculture provided the committee with a full list of names, Ms. Watson Coleman’s letter said.

But letter said that the list was initially shared only with Republicans on the committee. When the Democratic members asked Ms. Adcock for the names during the hearing, she said the names had already been sent over, possibly days earlier — a statement that the House Democrats said might be misleading.

“These actions raise serious concerns about the truthfulness of your sworn testimony before the committee,” Ms. Watson Coleman, a committee member, wrote in her letter.

Ms. Watson Coleman also demanded documents and answers to questions that she said would shed light on whether Ms. Adcock had misled the committee.

According to a Democratic aide, Ms. Adcock will be compelled to answer because these requests will be included in the committee’s “questions for the record,” which are generally sent after a hearing to gather more information from a witness.

The Agriculture Department did not immediately respond to an email about the letter or Ms. Adcock’s testimony.